6633643 has 2 divisors, whose sum is σ = 6633644. Its totient is φ = 6633642.

The previous prime is 6633607. The next prime is 6633647. The reversal of 6633643 is 3463366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6633643 - 2¹⁷ = 6502571 is a prime.

It is not a weakly prime, because it can be changed into another prime (6633647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3316821 + 3316822.

It is an arithmetic number, because the mean of its divisors is an integer number (3316822).

Almost surely, 2^6633643 is an apocalyptic number.

6633643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6633643 is an equidigital number, since it uses as much as digits as its factorization.

6633643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 31.

The square root of 6633643 is about 2575.5859527494. The cubic root of 6633643 is about 187.8959266287.

The spelling of 6633643 in words is "six million, six hundred thirty-three thousand, six hundred forty-three".